Examples with DatastorePersistentEntity org.springframework.cloud.gcp.data.datastore.core.mapping.DatastorePersistentEntity used on opensource projects

Example 1 with DatastorePersistentEntity

use of org.springframework.cloud.gcp.data.datastore.core.mapping.DatastorePersistentEntity in project spring-cloud-gcp by spring-cloud.

the class DefaultDatastoreEntityConverter method read.

@Override
@SuppressWarnings("unchecked")
public <R> R read(Class<R> aClass, BaseEntity entity) {
    if (entity == null) {
        return null;
    }
    DatastorePersistentEntity<R> ostensiblePersistentEntity = (DatastorePersistentEntity<R>) this.mappingContext.getPersistentEntity(aClass);
    if (ostensiblePersistentEntity == null) {
        throw new DatastoreDataException("Unable to convert Datastore Entity to " + aClass);
    }
    EntityPropertyValueProvider propertyValueProvider = new EntityPropertyValueProvider(entity, this.conversions);
    DatastorePersistentEntity<?> persistentEntity = getDiscriminationPersistentEntity(ostensiblePersistentEntity, propertyValueProvider);
    ParameterValueProvider<DatastorePersistentProperty> parameterValueProvider = new PersistentEntityParameterValueProvider<>(persistentEntity, propertyValueProvider, null);
    EntityInstantiator instantiator = this.instantiators.getInstantiatorFor(persistentEntity);
    Object instance;
    try {
        instance = instantiator.createInstance(persistentEntity, parameterValueProvider);
        PersistentPropertyAccessor accessor = persistentEntity.getPropertyAccessor(instance);
        persistentEntity.doWithColumnBackedProperties((datastorePersistentProperty) -> {
            // if a property is a constructor argument, it was already computed on instantiation
            if (!persistentEntity.isConstructorArgument(datastorePersistentProperty)) {
                Object value = propertyValueProvider.getPropertyValue(datastorePersistentProperty);
                if (value != null) {
                    accessor.setProperty(datastorePersistentProperty, value);
                }
            }
        });
    } catch (DatastoreDataException ex) {
        throw new DatastoreDataException("Unable to read " + persistentEntity.getName() + " entity", ex);
    }
    return (R) instance;
}

Example 2 with DatastorePersistentEntity

use of org.springframework.cloud.gcp.data.datastore.core.mapping.DatastorePersistentEntity in project spring-cloud-gcp by spring-cloud.

the class GqlDatastoreQuery method setGqlResolvedEntityClassName.

private void setGqlResolvedEntityClassName() {
    Matcher matcher = CLASS_NAME_PATTERN.matcher(GqlDatastoreQuery.this.originalGql);
    String result = GqlDatastoreQuery.this.originalGql;
    while (matcher.find()) {
        String matched = matcher.group();
        String className = matched.substring(1, matched.length() - 1);
        try {
            Class entityClass = Class.forName(className);
            DatastorePersistentEntity datastorePersistentEntity = GqlDatastoreQuery.this.datastoreMappingContext.getPersistentEntity(entityClass);
            if (datastorePersistentEntity == null) {
                throw new DatastoreDataException("The class used in the GQL statement is not a Cloud Datastore persistent entity: " + className);
            }
            result = result.replace(matched, datastorePersistentEntity.kindName());
        } catch (ClassNotFoundException ex) {
            throw new DatastoreDataException("The class name does not refer to an available entity type: " + className);
        }
    }
    this.gqlResolvedEntityClassName = result;
}

Example 3 with DatastorePersistentEntity

use of org.springframework.cloud.gcp.data.datastore.core.mapping.DatastorePersistentEntity in project spring-cloud-gcp by spring-cloud.

the class DatastoreTemplate method applyQueryOptions.

public static void applyQueryOptions(StructuredQuery.Builder builder, DatastoreQueryOptions queryOptions, DatastorePersistentEntity<?> persistentEntity) {
    if (persistentEntity.getDiscriminationFieldName() != null && persistentEntity.getDiscriminatorValue() != null) {
        StructuredQuery.Filter discriminationFilter = PropertyFilter.eq(persistentEntity.getDiscriminationFieldName(), persistentEntity.getDiscriminatorValue());
        StructuredQuery.Filter filter = builder.build().getFilter();
        if (filter != null) {
            discriminationFilter = StructuredQuery.CompositeFilter.and(filter, discriminationFilter);
        }
        builder.setFilter(discriminationFilter);
    }
    if (queryOptions == null) {
        return;
    }
    if (queryOptions.getLimit() != null) {
        builder.setLimit(queryOptions.getLimit());
    }
    if (queryOptions.getCursor() == null && queryOptions.getOffset() != null) {
        builder.setOffset(queryOptions.getOffset());
    }
    if (queryOptions.getCursor() != null) {
        builder.setStartCursor(queryOptions.getCursor());
    }
    if (queryOptions.getSort() != null && persistentEntity != null) {
        queryOptions.getSort().stream().map((order) -> createOrderBy(persistentEntity, order)).forEachOrdered((orderBy) -> builder.addOrderBy(orderBy));
    }
}

Example 4 with DatastorePersistentEntity

use of org.springframework.cloud.gcp.data.datastore.core.mapping.DatastorePersistentEntity in project spring-cloud-gcp by spring-cloud.

the class DatastoreTemplate method exampleToQuery.

private <T> StructuredQuery exampleToQuery(Example<T> example, DatastoreQueryOptions queryOptions, boolean keyQuery) {
    validateExample(example);
    T probe = example.getProbe();
    FullEntity.Builder<IncompleteKey> probeEntityBuilder = Entity.newBuilder();
    this.datastoreEntityConverter.write(probe, probeEntityBuilder);
    FullEntity<IncompleteKey> probeEntity = probeEntityBuilder.build();
    DatastorePersistentEntity<?> persistentEntity = this.datastoreMappingContext.getPersistentEntity(example.getProbeType());
    LinkedList<StructuredQuery.Filter> filters = new LinkedList<>();
    NullHandler nullHandler = example.getMatcher().getNullHandler();
    persistentEntity.doWithColumnBackedProperties((persistentProperty) -> {
        if (!ignoredProperty(example, persistentProperty)) {
            Value<?> value = getValue(example, probeEntity, persistentEntity, persistentProperty);
            addFilter(nullHandler, filters, persistentProperty.getFieldName(), value);
        }
    });
    persistentEntity.doWithAssociations((AssociationHandler<DatastorePersistentProperty>) association -> {
        PersistentPropertyAccessor<?> accessor = persistentEntity.getPropertyAccessor(example.getProbe());
        DatastorePersistentProperty property = association.getInverse();
        Object value = accessor.getProperty(property);
        Value<?> key = value == null ? NullValue.of() : KeyValue.of(objectToKeyFactory.getKeyFromObject(value, this.datastoreMappingContext.getPersistentEntity(value.getClass())));
        addFilter(nullHandler, filters, property.getFieldName(), key);
    });
    StructuredQuery.Builder<?> builder = keyQuery ? Query.newKeyQueryBuilder() : Query.newEntityQueryBuilder();
    builder.setKind(persistentEntity.kindName());
    if (!filters.isEmpty()) {
        builder.setFilter(StructuredQuery.CompositeFilter.and(filters.pop(), filters.toArray(new StructuredQuery.Filter[0])));
    }
    applyQueryOptions(builder, queryOptions, persistentEntity);
    return builder.build();
}

Example 5 with DatastorePersistentEntity

use of org.springframework.cloud.gcp.data.datastore.core.mapping.DatastorePersistentEntity in project spring-cloud-gcp by spring-cloud.

the class DatastoreTemplate method getKey.

private Key getKey(Object entity, boolean allocateKey, Key... ancestors) {
    DatastorePersistentEntity datastorePersistentEntity = this.datastoreMappingContext.getPersistentEntity(entity.getClass());
    DatastorePersistentProperty idProp = datastorePersistentEntity.getIdPropertyOrFail();
    if (datastorePersistentEntity.getPropertyAccessor(entity).getProperty(idProp) == null && allocateKey) {
        return this.objectToKeyFactory.allocateKeyForObject(entity, datastorePersistentEntity, ancestors);
    }
    return this.objectToKeyFactory.getKeyFromObject(entity, datastorePersistentEntity);
}